Sorry but the search feature had to be turned off again at least through the end of December for non-Club FTE members and non-staff. The load was simply way too high to be sustainable untill the updated load balancer and equipment can be installed.
You can always use Google or another search engine to search the site.
To give you an idea of the load here are some FTE site statistics from last night:
Threads: 540,933, Posts: 4,119,660, Users Registered: 372,229